Energizer



Dec. 28, 1943. c, E, ROBERTS 2,337,771

ENERG I ZER Filed Fe'bl 23, 1942 c1. IFFORO E. Roar/P725,

Patented Dec. 28, 1943 ENERGIZER Clifford E. Roberts, Joppa, Md.,assignor to The Glenn L; Martin Company, Middle River, Md., acorporation of Maryland Application February 23, 1942, Serial No'.432,093

2 Claims. (Cl. 138-80) This invention relates to an energizer and moreparticularly to a hydraulic fluid accumulator for particular use withaircraft to insure a source of hydraulic pressure in cases of emergency.

elastic or non-elastic fabric impregnated with an oil resistant materialhaving the properties of these products. a

The bottle is charged through its valve with It is well known that inmodern aircraft many 5 compressed air, while the inner envelope is initems of equipment therein, such as locks, cendeflated condition, and inuse, when the bag is tering devices, brakes, retractable landing gearssubjected to hydraulic fluid or oil pressure, it will and the like, areoperated by means of hydraulic H inflate and compress the air in thebottle to a fluid pressure. These systems are maintainedat degreewherein the hydraulic fluid pressure is the desired pressure by means ofpower driven equalized with the air pressure.

- pumps, pistons and the like. In systems of this Thus, in the event ofan emergency, as where character, it is desirable to provide them withthe oil pressure line from the pump is ruptured so called pressureequalizers so that in normal or the-oil pump su'ppiying this pressureceases to use, the pressures of the two fluids used, such function, thepilot of the aircraft has instantly as air and oil, will be equalizedand at the same available a source of compressed air pressure for timeform a source of emergency energy availenergizing thehydraulic fluid inthe system to able for operating the fluid controlled apparaoperate hisretractable landing gear or other intuses if the main pressure supply isdamaged. strumentality by reason of the energy of the com- In thepresent invention, an outer steel alloy pressed air within thesteelbottle compressing bottle or container is provided with a valve meansthe envelope containing the hydraulic fluid. i for filling the same withair. The bottle is fitted A further advantage of the present device iswith an interior, collapsible, synthetic rubber or its ability toprotect sensitive hydraulic mechaplastic impregnated fabric envelope orcell connisms by preventing hydraulic hammer and nected to a source ofoil pressure so that when I dampening flutter in the hydraulic system.oil is introduced into the interiorenvelope, the What I claim is:envelope unfolds or expands and compresses. the 1. An emergencyhydraulic pressure supply surrounding air within the steel bottle to adegree comprising a hollow cylindrical container, an imwhere the airpressure is equal to the interior perviousinflatabie bag enclosedthereby, said conpressure of the oil within the rubber bag. When tainerhaving .an enlarged opening in one end such a point is reached, the airand oil pressures thereof, a removable fitting for said opening to inthe system are equalized, and in the event that which the hydraulicpressure line is secured, the hydraulic fluid pressure is decreased, asby a relatively small opening in the opposite end rupture of the oilpump system, the compressed and a conduit connected thereto, throughwhich air in the bottle is available for operation of the compressed airmay be introduced into the space hydraulic devices normally acted on bythe oil 5 between said container and said bag, an inflatpressure, able,impervious bag for receiving the hydraulic In the accompanying drawing:fluid attached to said fitting and extending into Fig. l is a sectionalview, partly in cross secthe said container, the interior of said bagcomtion, showing. the inner, collapsible, rubber bag munlcating with thehydraulic pressure system in deflated condition. through said fitting.

Fig. 2 is a similar view after the oil bag has 2. An emergency hydraulicpressure supply been inflated and the air and oil pressures havecomprising an elongated hollow container having reached a point ofequilibrium. a small fitting at one end for the introduction of Fig. 3is a vertical cross section through the compressed air and a relativelylarge opening at bottle and inflated oil bag. the other end, a removablefitting in said large Specifically, the invention contemplates usingopening having a passage therethrough coma strong,light-weight steelalloy bottle i suitably munlcating with the hydraulic pressure system,tapped at 2 for the insertion of an air line 3 an impervious,inflatable, elongated bag -general-. controlled by valve 42 The oppositeendof the lysimilarly shaped to conform with the internal bottle isprovided with an enlarged opening 5 contour of said container mounted onand reand'a suitable coupling 6 joined to the hydraulic movable withsaid fitting, said bag forming two fluid or oil pressure line 'i whichleads to the hychambers within the container, the outer one draulicsystem of the aircraft. having air under pressure and the inner one hav-An inflatable, elongated, tubular bag or ening hydraulic fluid wherebythe compressed air velope 8 is attached to the inner portion of theforces the hydraulic fluid from the bag to the coupling 6 andcommunicates therethrough -to hydraulic pressure system upon the'tailureof theconduit I. This interior bag is preferably the normal hydraulicpressure source. formed of synthetic, oil resistant. plastic or rubberymaterial such as neoprene, Thiokol, nylon CLIFFORD E. ROBERTS.

or the like. It may also be constructed of an v

